What are Successful Entrepreneurs Reading?

While I spend a ton of time reading all sorts of things, many entrepreneurs are hardcore into just reading about business. I rarely read about it. I would rather read about science, or some philosophy of some sort I guess,b ut at times you have to read what will maybe help your business. So I like to see what millionaire entrepreneurs are recommending as things to read in between looking up business insurance from TechInsurance.com. Here are a few book recs from entrepreneurs.